造粒粒度分布及其预测模型

来源期刊：钢铁2010年第6期

论文作者：代书华 沈峰满

文章页码：20 - 25

关键词：原料粒度； 造粒粒度； 预测模型； 水分质量分数

Key words：material size； pelletizing size； prediction model； moisture content

摘    要：以造粒粒度分布为研究对象,通过原料粒度及粒度分布、水分质量分数对造粒粒度分布影响的实验室研究,改进和优化烧结生产工艺,提出一套合理的烧结生产控制模型,以实现烧结生产的自动化控制和造粒粒度分布的预测。研究结果:在适宜的造粒水分范围内,随水分质量分数的增加,造粒粒度增加;但当水分质量分数过大时,造粒粒度反而减小。原料粒度对造粒粒度的影响是主要因素,而水分质量分数对造粒粒度的影响是次要因素。由造粒粒度分布数学模型得出的预测值与试验值之间有较好的一致性,原料粒度分布为正态分布时造粒粒度分布也为正态分布,并且造粒粒度分布的质量概率密度函数可由原料粒度分布的质量概率密度函数和原料粒度分割系数确定。

Abstract: The effects of material size and its distributions,the moisture content on palletizing size distribution were investigated.The sinter production process was improved and optimized;a reasonable model of controlling sinter production was developed.The results indicate: with increasing the moisture content the pelletizing size increases in the range of the suitable moisture,however the granule size decreases when the moisture content is too high.The influence of the material size on the granule size plays a dominant role,and the moisture content has secondary effect on granule size.The predicted value obtained from the mathematical model of the pelletizing size and distribution is in satisfactory agreement with the experimental data,which has supplied the theoretical basis for applying the mathematical model to the practical sintering process.When the material size distribution is the Gauss distribution the pelletizing size distribution is Gauss distribution too.The mass density function of the granule size distribution can be ascertained by the mass density function of the size distribution and the particle partition coefficient for the material.